Company Overview

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Company Overview

The Next Chapter in Green-Building Engineering. 

General Energy Corp. (GEC) provides energy-efficiency and solar energy systems design, installation and management for companies seeking to reduce energy costs, improve their sustainability and mitigate climate risks. Founded in 1985, GEC has completed more than 900 projects for clients across Illinois (or the Midwest).  

GEC engineering design solutions are as pragmatic as they are innovative. As a full-service MEP/FP engineering consulting companywe have expanded our service offerings as our clients’ needs have grown. Today, GEC provides complete LEED engineering design services as well as integrated design and installation of solar energy systems.  

Our team take a consultative approach to every project, designing energy systems that take full advantage of the latest technologies while staying on task and on budget. With decades of experience in energy efficiency, we can significantly reduce your energy load, then design a solar PV system that offsets the rest of your electricity use with clean energy. As a SunPower dealer, we offer the #1 commercial solar solution, ideal for organizations with high energy needs. 

While GEC has received many awards over the years, our proudest accomplishment is having  worked with the best and brightest in Illinois to advance energy conservation best practices and green-building design.  

Learn more about our projects. 

Management Team

Prem Mehrotra, PE, BEP, LEED AP

Prem Mehrotra, PE, BEP, LEED AP


Mr. Mehrotra is the founding President of General Energy Corporation (GEC). He is an executive with broad experience of all the aspects of renewable energy, energy efficiency, and sustainability. He is a licensed professional engineer, and founded GEC in 1985 with a sole objective of energy efficient designs and sustainability. He is a recipient of several regional and national awards in this field. GEC is headquartered has moved to Elk Grove Village, IL. Prem and GEC have extensive experience in engineering and construction management of large and small construction projects. Prior to establishing GEC, Prem co-founded Energy Resources + Planning, Inc. He worked with Sargent and Lundy Engineers where he was one of the team members for construction of LaSalle County Nuclear Station (2200 MW) located in Marseilles, Illinois. He was responsible for design and engineering of a unique heat recovery system from waste heat for which ‘Power Engineering Magazine’ declared LaSalle County Station as ‘Pace Maker’ of industry in 1979.

Mr. Mehrotra is recipient of several awards in energy efficiency, and excellence in engineering. Mr. Mehrotra is a Fellow of Association of Energy engineers (AEE), and a life member of American Society of Heating and Refrigerating, and Air-conditioning engineers (ASHRAE).

Mr. Mehrotra is also very active in development of renewable energy projects such as solar thermal water heating systems and roof-top PV solar systems. Mr. Mehrotra was founder President of Grant Park Wind Farm, a utility grade wind farm with a target capacity of 200 MW and a target date to start construction by the year 2020/2021. NextEra Energy Resources has taken over the future development of Grant Park Wind Farm as of October 2018.

Mr. Mehrotra holds a degree of Bachelor of Science in Mechanical Engineering, and a Masters in Management from the Kellogg School of Management at Northwestern University. He is certified Professional engineer in States of WI, IN. OH, and IL.

Tony Jaswal

Tony Jaswal

Executive Vice President

Mr. Jaswal is a mechanical engineering graduate and a certified energy manager (CEM). He is responsible for business development and assist in corporate matters and strategic planning. He has extensive industry experience while working with Bluestone Energy Services, Patrick Engineering, and Abbott Laboratories.For the last six years he has developed many energy efficiency projects including process cooling, refrigeration, indoor and outdoor lighting, chiller and boiler plant projects for industrial and commercial clients. Some of the major projects include Federal Mogul, Aurora Specialty Textile Group, Baker and Taylor, Metro-South Hospital, and Dr. Pepper. He is responsible of coordinating GEC effort to arrange funding of projects through funding from energy savings.

Tony, while working with Bluestone Energy Services, was responsible for planning, execution, and closing of energy efficiency projects. At Patrick Engineering, he was responsible for quality check and compliance with ComEd’s Smart Ideas for Business program.

Tony is a BSME degree holder from the University of Illinois. He is a certified energy manager (CEM).

Vishal Shah, CEM, EBCP, NABCEP PV Associate

Vishal Shah, CEM, EBCP, NABCEP PV Associate

Director of Operations

Mr. Shah brings a decade of expertise in the energy efficiency industry, focusing on the development and implementation of energy efficiency and renewable projects for commercial and industrial facilities. His role encompasses conducting comprehensive assessments in solar PV, compressed air, process cooling, industrial refrigeration, lighting, HVAC, and Retro-Commissioning (RCx) engineering to identify projects that yield significant electricity and natural gas savings. He offers technical support in creating design/build turnkey proposals, developing internal tools and models for precise energy savings forecasts, and streamlining project milestones through his extensive experience. Additionally, he is instrumental in tracking continuous lessons learned across all projects, and in providing technical training and guidance to a team of engineers managing these turnkey projects. Currently, Mr. Shah is actively engaged in designing ground-mounted and roof-mounted solar PV systems for existing customers, aiming to produce onsite electricity and reduce their carbon footprint. He has completed the NABCEP PV Design Associate training and is in the process of obtaining the NABCEP Board PV Design Specialist Certification.

Vishal Shah holds a Bachelor of Science in Mechanical Engineering and a Master of Science in Energy Engineering from the University of Illinois, Chicago. He is a Certified Energy Manager (CEM), an Existing Building Commissioning Professional (EBCP), and a NABCEP Photovoltaic Associate (PVA-060420-033017).

John Clai, RPA, FMA, SMA

John Clai, RPA, FMA, SMA

Sr. Electrical Engineer and Safety Consultant

Mr. Clai is Vice President of Operations. He joined GEC in the last year and has over 35 years of diversified experience in the design, engineering, management, and construction oversight of electrical, mechanical, life safety, security, and technology related systems for a wide variety of buildings. As VP of Operations at GEC, Mr. Clai has successfully lead multi-functional teams to identify, develop, and implement cost-effective, innovative solutions to complex problems and issues in rehabilitation and new construction of parking garages, hospitals, correctional buildings, commercial properties, industrial, and educational facilities. Mr. Clai holds a Bachelor of Science in Electrical Engineering, and MSML from National Louis University. He is a BOMI certified Real Property Administrator (RPA), Facility Management Administrator (FMA), and Systems Management Administrator (SMA).

Fred Tongsy, PE, CIPE

Fred Tongsy, PE, CIPE

Sr. Mechanical Engineering Consultant

Mr. Tongsy is a mechanical engineering graduate and a licensed professional engineer in the state of Illinois. Mr. Tongsy has 35 years of diversified experience in design, engineering and construction of mechanical systems. He has extensive experience providing innovative design and engineering solutions for demanding and highly complex mechanical/HVAC/plumbing systems in a wide variety of buildings, including high-rise commercial buildings, and industrial plants. He has extensive experience in performing level 3 energy audits, engineering design and documents, and development of cost and savings analysis for energy conservation measures. He has performed building energy simulation programs for our clients like Argonne National Laboratory, University of Chicago, Chicago Public Schools, and Alcatel/Lucent.

Advisory Board

Sanjeev Varma

Sanjeev Varma

Sanjeev has 35 years of experience which includes 20 years in the corporate world and 14 years in Consulting and Investment Banking. He is a Senior Advisor to the Chicago-based Investment Bank Lincoln International. Previously he was a Managing Director with Teneo Capital, an I Bank in New York. Previously Sanjeev served on the Senior Advisory Board at ChaninCapital Partners / Duff & Phelps Securities, LLC. At Duff & Phelps he advised on M&A transactions and Restructurings. In 2005 he opened the Detroit office for ChaninCapital Partners.

He has provided consulting services to Mercedes Benz Technology (Germany) and MalibuIQ–Hughes Research Lab (California). Prior to Chanin, Sanjeev spent several years as a Senior Advisor to the German Government Agency IIC (later merged with ‘Invest-in-Germany’) helping bring companies in the U.S. and India to invest in Germany.

In the corporate world, he was Director of Marketing & Corporate Planning for Magna Powertrain, a $3 billion subsidiary of the $24 billion Magna Group. Prior to this he worked at New Venture Gear (“NVG”), a $1.6B Daimler Chrysler & General Motors Joint Venture company, where he was involved in its merger with Magna Powertrain. At NVG, he served as the Director of Marketing, Strategic Planning and Asian Sales, where he managed all marketing, strategic planning, and business development activities in NAFTA, Asia and Europe.

Sanjeev has a BS in Mechanical Engineering from Indian Institute of Technology in India and a MS in Mechanical Engineering from Syracuse University in the US. He completed Executive Education Programs in Finance & Marketing at Wharton Business School. He is a FINRA registered representative holding Investment Banking Licenses Series 63, 79 and 82.

Brent Lewis

Brent Lewis

Formerly chief commercial officer at Tri Global Energy, the largest wind developer in Texas, Brent has leadership experience in taking mid to late stage utility scale wind projects to JV/exit/financing/construction - over 1,200 MWs of transactions in the past year, with a MOIC of +3x for investors. Brent has over 15 years of energy/renewable energy corporate finance, investment banking and project finance experience, executing over $15B in transactions. Brent holds a Bachelor of Arts (economics) degree from the University of Western Ontario and a Masters in Management from the Kellogg School of Management at Northwestern University.

Rab Malhotra

Rab Malhotra

Rab is a registered professional engineer in state of Maryland. Rab was Director, Office of Contract Administration for Argonne National Laboratory (ANL) until his retirement in September 2011. Rab joined ANL as a project manager and over the next 30+ years held positions of increasing responsibility in the area of strategic facility planning, engineering, construction, and maintenance and project management. Rab received MBA degree with honors through the University of Chicago Executive MBA Program. He also holds a bachelor’s and master’s degree in mechanical engineering.

Dr. Pramod Jain

Dr. Pramod Jain

Dr. Jain is recognized as a global expert in the planning of wind projects and has worked on projects in the U.S., the Caribbean, and Latin America that range from a single100-kW turbine to a 100-plus MW wind farm. Dr. Jain is a Ph.D. in Mechanical Engineering from the University of California, Berkeley, and holds a M.S. from the University of Kentucky, Lexington, and a B. Tech. from the Indian Institute of Technology, Mumbai.



GEC is a business partner with US Department of Energy’s ‘Industrial Technology Program (ITP)’ and also participated in ‘Chicago Industrial Rebuild Program (CIRP)’. GEC has extensive experience working with different kinds of industrial facilities such as chemical plants, metal casters and foundries, confectionaries, food processing, auto parts manufacturing, plastic moldings, paper mills and forest products.


GEC’s commercial clients include high rise, medium rise, and low rise office buildings, apartment buildings, hotels, restaurants, parking structures, and mixed use structures.


GEC’s experience with governmental facilities include municipal facilities such as office buildings, recreational facilities, ice skating arenas, field houses, waste water treatment plants, water treatment plants, and power plants; Federal and state facilities such as medium and high security prisons, public housing, mental health hospitals, and national laboratories


GEC’s experience with institutional clients includes educational facilities, correctional facilities, national laboratories, hospitals, and nursing homes.


GEC’s educational clients include K through 12 schools, community colleges, and universities.


GEC’s healthcare clients include hospitals, clinics, nursing homes, mental health facilities, and assisted living.


GEC has provided services to more than 150 religious facilities of different denominations such as churches, synagogues, Islamic centers, Hindu temples, Gurdwaras.


GEC’s recreational experience includes park district facilities, community halls, ice arenas, swimming pools, YMCAs, field houses, and gymnasiums.


General Energy Corporation’s focus on innovations, state-of-the-art technology, and professionalism has earned recognitions from its peers and associations. Thanks to our dedicated and talented professionals with strong project partnership with our clients, General Energy Corporation has earned the following awards:

ComEd’s “2020 Energy Efficiency Service Provider Innovator Award”

SunPower’s “2020 Regional Intelegant” Award for Commercial Solar Installation

Constellation Energy’s “2020 Top EME Alliance Partner”

2012 ASHRAE National-level Technology Award

Category 1 Commercial Building – New for Evelyn Pease Tyner Interpretive Center, Glenview, IL

2011 ASHRAE Region VI 1st place

Category 1 Commercial Building – New for Evelyn Pease Tyner Interpretive Center, Glenview, IL

2010 Excellence in Engineering

ASHRAE Illinois Chapter for Evelyn Pease Tyner Interpretive Center, Glenview, IL

2005-2006 Technology Award

ASHRAE Region VI, Energy Savings from Boiler & Chiller Upgrades, Conant High School, Hoffman Estates, Illinois

2005 Excellence in Engineering Award

ASHRAE Chicago, Energy Savings from Boiler & Chiller Upgrades, Conant High School, Hoffman Estates, Illinois

2004 Energy Project of the Year Award

AEE Chicago Chapter for James B. Conant High School, Hoffman Estates, Illinois